QDI SynactiX 5EP Manual page 7

Caution 1
Be sure to unplug the AC power supply before adding or removing
expansion cards or other system peripherals, especially the SDRAM
memory, otherwise your mainboard or the system memory might be
seriously damaged.
The power status of the system is indicated by the red LED near the battery
on the mainboard. If the LED is on, adding or removing devices like SDRAM
memory is prohibited.
Caution 2
Be sure to add some Silicone Grease between the PentiumIII
(Coppermine) CPU and the FAN to keep them fully contact , meanwhile
to meet the heat sink requirement.
Manual for SynactiX 5EP/5EI